A low noise class-AB operational amplifier with noise optimization technique

Seungheun Song, Kwanseok Jung, Subin Kim, Joongho Choi

Research output: Chapter in Book/Report/Conference proceedingConference contributionpeer-review

2 Scopus citations

Abstract

This paper presents a low noise operational amplifier with noise optimization and reduction techniques. It consists of a folded-cascode amplifier and a class-AB output stage with a simple minimum selector. The input-referred noise of an input transistor can be optimized through utilization of the relationship between input parasitic capacitance and flicker noise. The other main noise sources in a folded-cascode amplifier are reduced by increasing the size, adding resistors or by stacking FETs at the cascade biasing circuitry. The proposed amplifier is implemented in a 0.18-μm CMOS process.

Original languageEnglish
Title of host publicationISOCC 2014 - International SoC Design Conference
PublisherInstitute of Electrical and Electronics Engineers Inc.
Pages96-97
Number of pages2
ISBN (Electronic)9781479951260
DOIs
StatePublished - 16 Apr 2015
Event11th International SoC Design Conference, ISOCC 2014 - Jeju, Korea, Republic of
Duration: 3 Nov 20146 Nov 2014

Publication series

NameISOCC 2014 - International SoC Design Conference

Conference

Conference11th International SoC Design Conference, ISOCC 2014
Country/TerritoryKorea, Republic of
CityJeju
Period3/11/146/11/14

Keywords

  • class-ab amplifier
  • input referred noise
  • low noise technique
  • operational amplifier

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